203423102434 has 4 divisors (see below), whose sum is σ = 305134653654. Its totient is φ = 101711551216.

The previous prime is 203423102413. The next prime is 203423102437. The reversal of 203423102434 is 434201324302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434201324302 = 2 ⋅217100662151.

It can be written as a sum of positive squares in only one way, i.e., 199786650625 + 3636451809 = 446975^2 + 60303^2 .

It is not an unprimeable number, because it can be changed into a prime (203423102437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50855775607 + ... + 50855775610.

Almost surely, 2^203423102434 is an apocalyptic number.

203423102434 is a deficient number, since it is larger than the sum of its proper divisors (101711551220).

203423102434 is a wasteful number, since it uses less digits than its factorization.

203423102434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101711551219.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 203423102434 its reverse (434201324302), we get a palindrome (637624426736).

The spelling of 203423102434 in words is "two hundred three billion, four hundred twenty-three million, one hundred two thousand, four hundred thirty-four".